feat(esp_security): support s31 security clock management

components/esp_hal_security/esp32s2/include/hal/sec_ll.h

@@ -0,0 +1,26 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+#include "soc/clk_tree_defs.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Select crypto clock source
+ *
+ * @note Not supported. No-op.
+ */
+static inline __attribute__((always_inline)) void sec_ll_crypto_clk_src_sel(soc_module_clk_t src)
+{
+    (void)src;
+}
+
+#ifdef __cplusplus
+}
+#endif